A 4-unit-cell superstructure in optimally doped YBa2Cu3O6.92 superconductor

Zahirul Islam; X. Liu; S. K. Sinha; J. C. Lang; S. C. Moss; D. Haskel; G. Srajer; P. Wochner; D. R. Lee; D. R. Haeffner; U. Welp

doi:10.1103/PhysRevLett.93.157008

A 4-unit-cell superstructure in optimally doped YBa2Cu3O6.92 superconductor

Superconductivity 2009-11-10 v1

Authors: Zahirul Islam , X. Liu , S. K. Sinha , J. C. Lang , S. C. Moss , D. Haskel , G. Srajer , P. Wochner , D. R. Lee , D. R. Haeffner , U. Welp

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Abstract

Using high-energy diffraction we show that a 4-unit-cell superstructure, q0=(1/4,0,0), along the shorter Cu-Cu bonds coexists with superconductivity in optimally doped YBCO. A complex set of anisotropic atomic displacements on neighboring CuO chain planes, BaO planes, and CuO2 planes, respectively, correlated over ~3-6 unit cells gives rise to diffuse superlattice peaks. Our observations are consistent with the presence of Ortho-IV nanodomains containing these displacements.

Keywords

high-temperature superconductivity superconductivity

Cite

@article{arxiv.cond-mat/0312622,
  title  = {A 4-unit-cell superstructure in optimally doped YBa2Cu3O6.92 superconductor},
  author = {Zahirul Islam and X. Liu and S. K. Sinha and J. C. Lang and S. C. Moss and D. Haskel and G. Srajer and P. Wochner and D. R. Lee and D. R. Haeffner and U. Welp},
  journal= {arXiv preprint arXiv:cond-mat/0312622},
  year   = {2009}
}

Comments

Corrected typo in abstract

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